(WSIL) -- One question you may ask yourself is how tornadoes are measured? It's with the Enhanced Fujita (EF) scale which is gives a tornado a rating based on the damage and estimated wind speeds.

Being that the EF-scale is entirely a damage-based scale, tornadoes must do damage in order to be rated. The scale also underrates tornadoes in some cases where structures are weak or not hit.

The original "F-scale" was in use from the 1970s to 2007, while new "Enhanced Fujita (EF) scale" has been in use since 2007. Unlike hurricanes, which are based on the wind speed of a storm as it ...